run.py script containing only the '#! python3' shabang line.
Test performed in the Windows command prompt.
Environment as described in the Python issue report.

Python traceback:
> D:\Workplace>run.py
> Fatal Python error: Py_Initialize: can't initialize sys standard streams
> Traceback (most recent call last):
>   File "c:\Program Files\Python\Python333\lib\io.py", line 52, in <module>
>     import abc
>   File "<frozen importlib._bootstrap>", line 1565, in _find_and_load
>   File "<frozen importlib._bootstrap>", line 1532, in _find_and_load_unlocked
>   File "<frozen importlib._bootstrap>", line 584, in _check_name_wrapper
>   File "<frozen importlib._bootstrap>", line 1022, in load_module
>   File "<frozen importlib._bootstrap>", line 1003, in load_module
>   File "<frozen importlib._bootstrap>", line 560, in module_for_loader_wrapper
>   File "<frozen importlib._bootstrap>", line 853, in _load_module
>   File "<frozen importlib._bootstrap>", line 967, in get_code
> KeyboardInterrupt

Visual studio reports the process as having only 2 threads.

C traceback for thread named 'Main Thread':
>	msvcr100.dll!__crt_debugger_hook()
>  	msvcr100.dll!_call_reportfault()  + 0x124 bytes
>  	msvcr100.dll!abort()  + 0x35 bytes
>  	python33.dll!Py_FatalError(const char * msg=0x0000000001e5a490)  Line 2379	C
>  	python33.dll!_Py_InitializeEx_Private(int install_sigs=1, int install_importlib=0)  Line 389	C
>  	python33.dll!Py_Main(int argc=0, unsigned short * * argv=0x0000034300000000)  Line 652	C
>  	python.exe!__tmainCRTStartup()  Line 552 + 0x19 bytes	C
>  	kernel32.dll!BaseThreadInitThunk()  + 0xd bytes
>  	ntdll.dll!RtlUserThreadStart()  + 0x21 bytes

C traceback for thread named 'Win64 Thread':
>	ntdll.dll!ZwWaitForMultipleObjects()  + 0xa bytes
>  	ntdll.dll!TppWaiterpThread()  + 0x147 bytes
>  	kernel32.dll!BaseThreadInitThunk()  + 0xd bytes
>  	ntdll.dll!RtlUserThreadStart()  + 0x21 bytes

Complete Visual Studio debug output:
> 'python.exe': Loaded 'C:\Program Files\Python\Python333\python.exe'
> 'python.exe': Loaded 'C:\Windows\System32\ntdll.dll'
> 'python.exe': Loaded 'C:\Windows\System32\kernel32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\KernelBase.dll'
> 'python.exe': Loaded 'C:\Program Files\Python\Python333\python33.dll'
> 'python.exe': Loaded 'C:\Windows\System32\user32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\gdi32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\lpk.dll'
> 'python.exe': Loaded 'C:\Windows\System32\usp10.dll'
> 'python.exe': Loaded 'C:\Windows\System32\msvcrt.dll'
> 'python.exe': Loaded 'C:\Windows\System32\advapi32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\sechost.dll'
> 'python.exe': Loaded 'C:\Windows\System32\rpcrt4.dll'
> 'python.exe': Loaded 'C:\Windows\System32\shell32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\shlwapi.dll'
> 'python.exe': Loaded 'C:\Program Files\Python\Python333\msvcr100.dll'
> 'python.exe': Loaded 'C:\Windows\System32\imm32.dll'
> 'python.exe': Loaded 'C:\Windows\System32\msctf.dll'
> 'python.exe': Loaded 'C:\Windows\System32\nvinitx.dll'
> 'python.exe': Loaded 'C:\Windows\System32\cryptsp.dll'
> 'python.exe': Loaded 'C:\Windows\System32\rsaenh.dll'
> 'python.exe': Loaded 'C:\Windows\System32\cryptbase.dll'
> The thread 'Win64 Thread' (0x1d08) has exited with code 0 (0x0).
> Microsoft Visual Studio C Runtime Library has detected a fatal error in python.exe.
>
> Press Break to debug the program or Continue to terminate the program.
> C:\Program Files\Python\Python333\python33.dll: Symbols loaded.
> C:\Program Files\Python\Python333\python.exe: Symbols loaded.
> C:\Program Files\Python\Python333\msvcr100.dll: Symbols loaded (source information stripped).
> C:\Windows\System32\kernel32.dll: Symbols loaded (source information stripped).
> C:\Windows\System32\ntdll.dll: Symbols loaded (source information stripped).